Aira commands the Hachiryokaku faction—dubbed the Aira Army—on Machine Island, one of three powers locked in a relentless contest for territorial dominance and resource supremacy. Her all-female force operates Psycho Gear units piloted by four sworn sisters: Hurricane, Fancy, Flash, and Misty, each embracing combat styles and codenames evoking Cutie Honey’s transformative flair. The faction’s warriors clash amid crystalline architecture and Hellenistic-inspired robes, their battles accented by glinting jewelry and billowing fabrics.

Aira’s regal presence mirrors Aira Mu from *God Mazinger*, marked by a gleaming tiara, ornate boots, and cascading earrings. Her troops wield precision beam artillery and shimmering laser blades, a stark counter to rival factions’ crude weaponry and archaic tactics. Strategic dominance is secured through her partial command of the Gravity Curtain, a volatile system accelerating the island’s destabilization.

The shadow of her elder sister Himiko looms over Hachiryokaku’s history; Himiko’s defection to the Garan Army and subsequent assassination by Kiba during a clash over the Iron Kaiser’s whereabouts irrevocably shifted the island’s balance of power.

Beyond the OVA’s events, the novelization reveals Aira’s pragmatic alliance with the Skull Force following the Gravity Curtain’s collapse. After Mazinkaizer SKL’s fall, she mobilizes Psycho Gears to rescue stranded pilots, sheltering them within her fortress. Her faction’s advanced engineering proves pivotal in forging the successor mecha Mazinkaiser SKL Vertex, signaling enduring collaborations in the island’s fragile post-crisis landscape.